Gas separation – Flexible or collapsible bag type – With separable nonfiltering residue container
Patent
1976-12-15
1978-04-18
Nozick, Bernard
Gas separation
Flexible or collapsible bag type
With separable nonfiltering residue container
55371, 55374, 55380, 55473, 15351, B01D 4602
Patent
active
040849481
ABSTRACT:
A filter bag assembly for a vacuum cleaner is disclosed. The assembly includes an elongated, relatively rigid, hollow tube coupled at one end to the exhaust of a vacuum cleaner. The tube runs upwardly along the handle of the vacuum cleaner and is attached at its other end to a porous filter bag. The filter bag runs downwardly along the rigid tube and has an open end closed by a nonporous dirt-collecting bag. The tube, the porous bag, and the nonporous bag are encased in an envelope so that the nonporous bag is held in a collapsed or stored condition at the end of the filter bag during normal use of the cleaner. To empty the filter bag of its collected dirt, the envelope is opened to expose the nonporous bag and to permit the dirt in the filter bag to drop downwardly into the nonporous bag. The vacuum cleaner may be turned on and off a number of times to distend the bag and dislodge dirt from the filter bag during the emptying operation.
REFERENCES:
patent: 1835770 (1931-12-01), Gasner et al.
patent: 1944270 (1934-01-01), Reeve
patent: 2007518 (1935-07-01), Calhoun
patent: 2122568 (1938-07-01), Gasner et al.
patent: 2174730 (1939-10-01), White
patent: 2755884 (1956-07-01), Pavlic
patent: 2948354 (1960-08-01), Hammink
patent: 3728847 (1973-04-01), Howard et al.
patent: 3995414 (1976-12-01), Kerr et al.
Nozick Bernard
The Scott & Fetzer Company
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